9352 netstat(1M) should be able to print IPv4 networks in CIDR form

*** 20,37 ****
  
  
         netstat -m [-T u | d ] [-v] [interval [count]]
  
  
!        netstat -i [-I interface] [-an] [-f address_family]
              [-T u | d ] [interval [count]]
  
  
!        netstat -r [-anvR] [-f address_family | filter]
  
  
!        netstat -M [-ns] [-f address_family]
  
  
         netstat -D [-I interface] [-f address_family]
  
  
--- 20,37 ----
  
  
         netstat -m [-T u | d ] [-v] [interval [count]]
  
  
!        netstat -i [-I interface] [-acn] [-f address_family]
              [-T u | d ] [interval [count]]
  
  
!        netstat -r [-acnvR] [-f address_family | filter]
  
  
!        netstat -M [-cns] [-f address_family]
  
  
         netstat -D [-I interface] [-f address_family]
  
  
*** 77,86 ****
--- 77,95 ----
             used by server processes are not shown. Under most conditions, only
             interface, host, network, and default routes are shown and only the
             status of physical interfaces is shown.
  
  
+        -c
+ 
+            Print IPv4 networks using CIDR (x.y.z.a/NN) notation with the -i,
+            -r, and -M options. IPv6 networks default to this, but due to
+            backward compatibility, IPv4 ones do not without this flag.  A
+            noncontiguous IPv4 netmask will print "/NM" if this flag is
+            enabled.
+ 
+ 
         -f address_family
  
             Limit all displays to those of the specified address_family. The
             value of address_family can be one of the following: